values=input().split()
x1=float(values[0])
y1=float(values[1])
x2=float(values[2])
y2=float(values[3])
x_distance=x2-x1
y_distance=y2-y1
print(pow(pow(x_distance,2)+pow(y_distance,2),0.5)) values=input().split() values input().split() ().split () input split x1=float(values[0]) x1 float(values[0]) float values[0] values 0 y1=float(values[1]) y1 float(values[1]) float values[1] values 1 x2=float(values[2]) x2 float(values[2]) float values[2] values 2 y2=float(values[3]) y2 float(values[3]) float values[3] values 3 x_distance=x2-x1 x_distance x2-x1 x2 x1 y_distance=y2-y1 y_distance y2-y1 y2 y1 print(pow(pow(x_distance,2)+pow(y_distance,2),0.5)) print pow(pow(x_distance,2)+pow(y_distance,2),0.5) pow pow(x_distance,2)+pow(y_distance,2) pow(x_distance,2) pow x_distance 2 pow(y_distance,2) pow y_distance 2 0.5 y2=float(values[3]) float(values[3]) y2 y_distance=y2-y1 y2-y1 y_distance values=input().split() input().split() values x2=float(values[2]) float(values[2]) x2 x_distance=x2-x1 x2-x1 x_distance y1=float(values[1]) float(values[1]) y1 x1=float(values[0]) float(values[0]) x1
values=input().split()
x1=float(values[0])
y1=float(values[1])
x2=float(values[2])
y2=float(values[3])
x_distance=x2-x1
y_distance=y2-y1
print(pow(pow(x_distance,2)+pow(y_distance,2),0.5))
